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https://github.com/mobiletelesystems/image-optimize

Image optimization microservice for web request.
https://github.com/mobiletelesystems/image-optimize

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Image optimization microservice for web request.

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# Microservice for responsive resize, compression and optimization of images on the fly for web pages

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[![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-2.1-4baaaa.svg)](CODE_OF_CONDUCT.md)
[![GitHub license](https://img.shields.io/badge/license-MIT-green.svg)](https://github.com/MobileTeleSystems/image-optimize/blob/main/LICENSE)

Optimizing images helps reduce image weight and increases website loading speed,
which is very important for both users and search engines. For these purposes,
we have created a microservice that perfectly copes with this task.

Features:
- Resize images for the user's screen size,
- Image compressions to reduce traffic,
- Converting images to modern formats such as webp and avif,
- Works with dynamically content, compression occurs on the fly,
- High compression speed, an average picture is processed in just 200 ms,
- Includes exporter of metrics for Prometheus,
- Supports basic authorization for multiple domains and endpoints,
- Supports security restrictions for allowed addresses.

## Try

To try the microservice features, run the container with the command:

```sh
docker run -it --rm -p 3000:3000 mtsrus/image-optimize
```

Now you can open the browser and check the work with the command:

```sh
http://localhost:3000/optimize?size=1060&format=webp&src=https://tb.mts.ru/static/landing/images-index2/banner/slider/partners.png
```

By changing the src, size, format parameters,
you can choose the path to the image,
the final size and the image format.

## Use

To start the microservice in production, use the command:

```sh
docker run -d --restart always -p 3000:3000 mtsrus/image-optimize
```

## Container parameters

- `-e PORT=3000` - the port on which the microservice will be launched, default 3000.
- `-e ALLOW_SIZES="100,200,1024-1920"` - an array of allowed sizes for the resulting images,
default 100-1920. Use specific values to prevent heavy loads on the server.

- `-e ALLOW_SOURCES="https%3A%2F%2Ftb.mts.ru%2F"` - url array of allowed addresses for image sources, default * (any).
Use comma as separator. It is recommended to apply encodeURIComponent to url.

- `-e BASIC_AUTHS="https%3A%2F%2Ftb.mts.ru%2F"` - an array of endpoints with basic authorization parameters, default empty.
Has format encodeURIComponent("url"):encodeURIComponent("login"):encodeURIComponent("password"). Use comma as separator.

- `-e SHARP_CONCURRENCY=0` - number of threads libvips' should create to process each image,
default 0 (will reset to the number of CPU cores).

## Components for web

To optimize images in the browser, there is a component for React. You can find it
[by following the link](https://github.com/MobileTeleSystems/image-optimize-react).
The component itself determines the most suitable image parameters and requests it from this microservice.